Abstract
The photosynthetic characteristics of coffee ( Coffea arabusta) plantlets cultured in vitro in response to different CO2 concentrations inside the culture vessel and photosynthetic photon flux (PPF) were investigated preliminarily. The estimation of net photosynthetic rate (Pn) of coffee plantlets involved three methods: (1) estimating time courses of actual Pn in situ based on measuring CO2 concentrations inside and outside the vessel during a 45-day period, (2) estimating Pn in situ at different CO2 concentrations and PPFs using the above measuring approach for 10-day and 30-day old in vitro plantlets, and (3) estimating Pn of a single leaf at different CO2 concentrations and PPFs by using a portable photosynthesis measurement system for 45-day old in vitro coffee plantlets. The results showed that coffee plantlets in vitro had relatively high photosynthetic ability and that the Pn increased with the increase in CO2 concentration inside the vessel. The CO2 saturation point of in vitro coffee plantlets was high (4500–5000 μmol mol-1); on the other hand, the PPF saturation point was not so high as compared to some other species, though it increased with increasing CO2 concentration inside the vessel.
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Nguyen, Q.T., Kozai, T., Niu, G. et al. Photosynthetic characteristics of coffee (Coffea arabusta) plantlets in vitro in response to different CO2 concentrations and light intensities. Plant Cell, Tissue and Organ Culture 55, 133–139 (1998). https://doi.org/10.1023/A:1006224026639
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DOI: https://doi.org/10.1023/A:1006224026639